Important Product Notice: This original Opella Torbeck model is discontinued by Fluidmaster March 2026. We have limited remaining stock available. Once sold out, the official Fluidmaster replacement is the Fluidmaster 722U-068.
Opella Torbeck Bottom Entry Adjustable Fill Valve — B661AT
The Opella Torbeck B661AT is a premium, UK-made bottom entry fill valve designed for quiet and efficient cistern refills. Known for its telescopic height adjustment (8.5" to 11.5"), it provides a versatile solution for varying toilet tank sizes. Constructed from high-quality recyclable materials, it ensures long-term durability and fits all standard 1/2" BSP connections.
Identification Guide:
MPN: B661AT | Range: Torbeck | Operating Pressure: 0.1 - 10 Bar | Connection: 1/2" Plastic Shank
Key Features
- Adjustable Height: Telescopic design fits cisterns from 8.5 to 11.5 inches.
- Whisper Quiet: Operates under 60dB, significantly quieter than standard valves.
- Low Pressure Performance: Reliable filling even at pressures as low as 0.1 bar.
- Debris Protection: Includes a removable 200-micron filter for easy maintenance.
Installation Note
Supplied with pressure restrictors and clear instructions. This valve is suitable for both high and low-pressure systems. Ensure the plastic shank is hand-tightened to avoid cross-threading during installation.